1497071440 has 20 divisors (see below), whose sum is σ = 3480691284. Its totient is φ = 598828544.

The previous prime is 1497071413. The next prime is 1497071441. The reversal of 1497071440 is 441707941.

It can be written as a sum of positive squares in 2 ways, for example, as 538054416 + 959017024 = 23196^2 + 30968^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1497071440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497071441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9356617 + ... + 9356776.

Almost surely, 2^1497071440 is an apocalyptic number.

1497071440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1497071440 is an abundant number, since it is smaller than the sum of its proper divisors (1983619844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1497071440 is a wasteful number, since it uses less digits than its factorization.

1497071440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18713406 (or 18713400 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1497071440 is about 38692.0074433984. The cubic root of 1497071440 is about 1143.9687873532.

The spelling of 1497071440 in words is "one billion, four hundred ninety-seven million, seventy-one thousand, four hundred forty".